const regex = /(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-5][0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-5][0-5])/;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-5][0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-5][0-5])', '')
const str = `255.0.0.1
127.0.0.1
127,0,0,1
192.168.178.90
89.50.50.123
0000.2.2.2
2.0000.2.2
2.2.0000.2
2.2.2.0000`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
if ((m = regex.exec(str)) !== null) {
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions